I printed with a 0.4mm nozzle @ 0.2mm layer height. You'll need to add a pause to insert the magnets. I used a little dab of hot glue to make sure the magnets weren't going to wander, but you probably don't need to.
The author remixed this model.
I added space for 2x 6x2mm magnets to be embedded inside the handle body, so that it can attach to my CoreOne